美国流行笑话：How old when you finish? 多大年纪的时候完工？

167　How old when you finish? 多大年纪的时候完工？

My plan was to build a garden walkway made up of wooden squares. I decided I'd slice railroad ties into two-inch-thick pieces. That's what I told the clerk at the lumberyard. “You got a power saw?” he asked. “No,” I said. “Can't I just use my hand saw?” He nodded slowly. “You could. But I just have one question. How old do you want to be when you finish?”
我的计划是用木头方块铺一条花园走道。我决定要把铁路枕木锯成两寸厚的木块。我就是这样告诉木材场的职工的。他问：“你有电动锯吗？”我说：“没有。我不能用手工锯吗？”他慢慢地点头说：“你能用。不过我有一个问题：你准备多大年纪的时候完工？”